Updated javascript version of the old chemistry checker.

Use yarn dev or yarn start to run the server locally on the port defined in .env.

The chemistry checker is available on /chemistry and the nuclear checker is available on /nuclear. Both have a parser on ./parse and a checker on ./check.

1. Ensure that Docker is installed
2. To remove old tagged versions, run:

docker rmi $(docker images ghcr.io/isaacphyiscs/chemistry-checker-js -a -q)

3. To build, run:

docker build -t ghcr.io/isaacphysics/chemistry-checker-js:latest -t ghcr.io/isaacphysics/chemistry-checker-js:{VERSION_TAG} --pull .

4. To deploy to the GitHub Container Registry, run:

docker push -a ghcr.io/isaacphysics/chemistry-checker-js:latest